Designed for high schools and playgrounds that are continually replacing bent rims. The BB-66 is designed for BB-22 fan-shaped steel backboards and fits most other back mount boards. Rear mount 5/8" (16 mm) X 18" (457 mm) single rim with heavy steel brace. 4" (102 mm) X 3 7/8" (98 mm) hole spacing. Continuous no-tie ring provides optimal rim strength. Net and hardware included.